Study on the Ecological Situation and the Nursery Function of the Posidonia Oceanica (L.) Delile, 1813 Prairies on the Islands of Ventotene E Santo Stefano
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Annual Research & Review in Biology 36(7): 58-76, 2021; Article no.ARRB.70769 ISSN: 2347-565X, NLM ID: 101632869 Study on the Ecological Situation and the Nursery Function of the Posidonia oceanica (L.) Delile, 1813 Prairies on the Islands of Ventotene e Santo Stefano Roberto Bedini1*, Marco Bedini1, Arianna Trafeli1 and Martina Manuele1 1Istituto di Biologia ed Ecologia Marina, Piazza Bovio n. 3/4, C.A.P. 57025, Piombino (LI) Italy. Authors’ contributions This work was carried out in collaboration among all authors. All authors read and approved the final manuscript. Article Information DOI: 10.9734/ARRB/2021/v36i730399 Editor(s): (1) Dr. Bechan Sharma, University of Allahabad, India. Reviewers: (1) Suneetha V, Vellore Institute of Technology, India. (2) Jinqing Wang, Weifang University, China. Complete Peer review History: https://www.sdiarticle4.com/review-history/70769 Received 02 May 2021 Accepted 07 July 2021 Original Research Article Published 24 July 2021 ABSTRACT On behalf of the Management of the Protected Marine Area of the island of Ventotene and Santo Stefano the Marine Ecology and Biology Institute of Piombino (ITALY) carried out a very in dept study aimed at knowledge of the ecological situation of the Posidonia Oceanica (L.) Delile, 1813 meadows. The most appropriate methodologies were used to be able to identify all the benthic species present in order to evaluate the efficiency of the nursery function of the prairies investigated. The results of the numerous species captured in the juvenile stage have demonstrated the excellent nursery function of the meadows of the island of Ventotene. Keywords: Nursery; biocenoses; Marine Protected Area. 1. INTRODUCTION Delile, 1813 prairies in the Marine Protected Area of the islands of Ventotene and Santo Stefano After carring out a study on the vagile (Fig. 1). biocenoses an in-depth study was carried out on the ecological situation and on the very important All the methods were used, both in immersion nursery function of the Posidonia oceanica (L.) and in the laboratory, suitable for identify all the _____________________________________________________________________________________________________ *Corresponding author: E-mail: [email protected], [email protected]; Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 vagile and sessile species present on the leaves have been taxonomically defined [12, 13, 14]. 3 and in the prairie. replicates were performed for each bathymetric interval (Fig. 5). 2. MATERIAL AND METHODS / EXPERIMENTAL DETAILS / 2.3 Bunch Counting METHODOLOGY The study was performed in three zones of the To evaluate the leaves density in each prairie a AMP (a, b, c) at two bathymetric intervals (4-7 m diving biologist used a 30x30 cm square for and 12-18 m) (Fig. 1 and Table 1). counting the P. oceanica bunches (Fig. 6). After that the density of the bunches was calculated x 2 The methods used are the following: m [15, 16,17]. 2.1 Visual Census 3. RESULTS Diving through a transept of 25 m along the bathymetric profile (Figs. 2 and 3) [1] 3.1 Bunch Counting (3 replicates) conspicuous sessile and floating species have been identified along the bathymetric profile by The count of the bunches indicate a very good noting and phothogeaphyng the observed situation in the prairies investigated which show species and their abundance [2,3,4]. 4 replicates a very particular conformation given by a were performed for each bathymetric interval. continuous presence of boulders in the prairies. 2.2 Sampling with a Plankton Net 3.2 Visual Census To evaluate the nursery function Sampling with a Plankton Net [5,6,7,8,9,10,11], a diving biologist with a plankton net (with 1 mm mesh) captures juvenile The study was not possible to carry out in the species, in reproduction species present on and bathymetric interval 0-3 m as far as this depth is between the P. oceanica leaves (Fig. 4) that no P. oceanica in any of the studied areas. Fig. 1. Map showing study area 59 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Table 1. Coordinates of study area Zone of the Marine Protected Bathymetric interval (m) WGS84 coordinates of the Area survey sites Zone A 4-7 40°47’24.7”N 13°26’57.1”E 12-18 40°47’13.8”N 13°27’25.2”E Zone B 4-7 40°47’22.9”N 13°25’47.1”E 12-18 40°47’04.8”N 13°24’32.9”E Zone C 4-7 40°47’41.8”N 13°26’9.38”E 12-18 40°47’38.3”N 13°26’09.2”E Fig. 2. Transept placement Fig. 3. Visual census 60 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Fig. 4. captures juvenile species from P. oceanica leaves Fig. 5. Sampling Fig. 6. Bunch counting 61 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Area A at the bathymetric interval 4-7 m Bunch number x m2 = 800; 744; Very dense prairie 700 Area B at the bathymetric interval 4-7 m Bunch number x m2 = 511; 600; Dense prairie 622 Area C at the bathymetric interval 4-7 m Bunch number x m2 = 822; 767; Very dense prairie 789 Area A at the bathymetric interval 12- Bunch number x m2 = 822; 844; Very dense prairie 18 m 756 Area B at the bathymetric interval 12- Bunch number x m2 = 778; 711; Very dense prairie 18 m 678 Area C at the bathymetric interval 12- Bunch number x m2 = 844; 733; Very dense prairie 18 m 800 Table 2. animal species and quantity. The quantities are reported according to the scheme required by the Coastal Fish Fauna Monitoring Program in the Marine Protected areas of the Ministry of the 62nvironment and the Protection of the Territory and the Sea Zone A Bathymetric 4-7 m 12-18 m interval Replica 5 6 7 8 9 10 11 12 transetto Cnidaria Pelagia 1 noctiluca Forsskål, 1775 Ctenophora Leucothea 1 multicornis Quoy & Gaimard, 1824 Echinodermata Ophidiaster 1 ophidianus Lamarck, 1816 Chordata Chromis 75 20 75 40 20 20 20 40 chromis Linnaeus, 1758 Coris julis 5 3 2 1 2 3 2 Linnaeus, 1758 Diplodus sargus 1 Linnaeus, 1758 Diplodus 8 5 8 5 6 2 vulgaris Geoffroy Saint- Hilaire, 1817 Oblada 8 4 3 20 3 5 melanura Linnaeus, 1758 Sarpa salpa 8 8 3 8 8 Linnaeus, 1758 Serranus scriba 1 1 Linnaeus, 1758 62 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Symphodus 2 ocellatus Linnaeus, 1758 Thalassoma 1 1 2 1 pavo Linnaeus, 1758 Zone B Bathymetric 4-7 m 12-18 m interval Replica 17 18 19 20 21 22 23 24 transetto Cnidaria Pelagia 1 noctiluca Forsskål, 1775 Chordata Chromis 75 75 40 75 40 40 75 40 chromis Linnaeus, 1758 Coris julis 2 1 5 6 2 Linnaeus, 1758 Dentex dentex 1 Linnaeus, 1758 Diplodus 1 puntazzo Walbaum, 1792 Diplodus sargus 2 Linnaeus, 1758 Diplodus 2 7 2 vulgaris Geoffroy Saint- Hilaire, 1817 Oblada 20 20 20 20 8 20 1 melanura Linnaeus, 1758 Sarpa salpa 3 1 20 20 Linnaeus, 1758 Serranus scriba 1 1 Linnaeus, 1758 Symphodus 2 3 ocellatus Linnaeus, 1758 Thalassoma 1 1 1 pavo Linnaeus, 1758 Zone C Bathymetric 4-7 m 12-18 m interval Replica 29 30 31 32 33 34 35 36 transetto Chordata Apogon 11 imberbis Linnaeus, 1758 63 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Atherina 150 150 hepsetus Linnaeus, 1758 Chromis 40 40 75 75 75 40 40 40 chromis Linnaeus, 1758 Coris julis 3 2 1 1 2 1 Linnaeus, 1758 Diplodus 2 1 sargus Linnaeus, 1758 Diplodus 2 1 7 1 3 vulgaris Geoffroy Saint- Hilaire, 1817 Mullus barbatus 2 Linnaeus, 1758 Oblada 10 20 melanura Linnaeus, 1758 Pagellus 1 acarne Risso, 1827 Sarpa salpa 20 3 8 3 1 Linnaeus, 1758 Serranus scriba 2 1 1 1 1 Linnaeus, 1758 Symphodus 1 1 tinca Linnaeus, 1758 Thalassoma 1 2 2 5 pavo Linnaeus, 1758 Table 3. In the table are expressed the quantity and size of taxonomically determined species Zone A Bathymetric 4-7 m 12-18 m interval Replica di 4 5 6 7 8 9 campionamento Mollusca Bittium latreillii 3 2 2 (juv.) Payraudeau, 1826 Pusillina philippi 1 Aradas & Maggiore, 1844 Rissoa 1 (0.6 cm) auriscalpium Linnaeus, 1758 Rissoa guerinii 1 2 Récluz, 1843 Rissoa 1 (0.4 cm) membranacea J. Adams, 1800 64 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Rissoa violacea 1 (0.5 cm) 1 (juv.) Desmarest, 1814 Arthropoda Cestopagurus 2 (juv.) 4 (di cui 3 timidus juv.) P. Roux, 1830 [in P. Roux, 1828-1830] Hippolyte 1 (1.0 cm) holthuisi 1 (0.9 cm) Zariquiey 1 (0.7 cm) Álvarez, 1953 Hippolyte 1 (0.9 cm) 2 (1.0 cm) 2 (1.3 cm) 2 inermis 1 (0.7 cm) 1 (0.7 cm) 3 (1.2 cm) Leach, 1816 1 (0.9 cm) 1 (0.7 cm) Chordata Symphodus 1 (1.6 cm) roissali Risso, 1810 Zone B Bathymetric 4-7 m 12-18 m interval Replica di 13 14 15 16 17 18 campionamento Mollusca Rissoa guerinii 1 Récluz, 1843 Rissoa violacea 1 (0.4 cm) 1 (juv.) 1 (0.4 cm) Desmarest, 1 (0.3 cm) 1814 Arthropoda Hippolyte 1 (1.1 cm) 1 (1.0 cm) 1 (1.7 cm) 2 (0.9 cm) 1 (1.6 cm) inermis 2 (0.7 cm) 1 (0.9 cm) 1 (1.1 cm) 1 (0.7 cm) 1 (1.2 cm) Leach, 1816 1 (0.7 cm) 1 (0.9 cm) 1 (0.6 cm) 2 (0.9 cm) 2 (0.7 cm) Hippolyte 1 (0.7 cm) varians Leach, 1814 [in Leach, 1813- 1815] Chordata Symphodus 1 (1.2 cm) roissali Risso, 1810 Zone C Bathymetric 4-7 m 12-18 m interval Replica di 22 23 24 25 26 27 campionamento Mollusca 65 Bedini et al.; ARRB, 36(7): 58-76, 2021; Article no.ARRB.70769 Aplus dorbignyi 1 Payraudeau, 1826 Bittium 1 reticulatum da Costa, 1778 Cratena 1 peregrina Gmelin, 1791 Gibbula ardens 1 Salis Marschlins, 1793 Ocenebra 1 edwardsii Payraudeau, 1826 Pusillina 1 lineolata Michaud, 1830 Rissoa 1 1 1 auriscalpium Linnaeus, 1758 Rissoa 1 membranacea J.